Not sure why the VPNv4 route is denied by BGP peer. Any help is appreciated.
Using Cisco 2811, 12.4(7a).
iBGP speaker (PE router) sends a VPNV4 route, but peer (P or PE router) denies the route with following error (debug message):
DENIED due to: extended community not supported;
The BGP configuration is (identical config on both speakers):
router bgp 1
neighbor 126.96.36.199 remote-as 1
neighbor 188.8.131.52 activate
neighbor 184.108.40.206 send-community extended
If your P router in question has anything to do with VPNv4 sessions or messages received then technically its not a P router but a PE router. Even though you may name it as a P router.
Also to troubleshoot your traffic switching problem, probably you may want to look at your LSP being functional for only the IGP labels, as P routers need not have any VPN information to switch traffic between PE's for end CE's. Just the IGP label for the next hop is enough.
Having said that, "no bgp default route-target filter" has nothing to do with inter-as, as none of the inter-as options except one option requires this command.
This command was introduced to nullify the basic BGP default in IOS which was introduced to conserve memory.
As any PE router which does have have a import RT configured should not store the received routes in the updates to conserve memory. So in conditions where you need to override this behaviour you can always use "no bgp default rt filter".
One of the reason for this error is "Mismatch in route-target community strings for route import/export" . Pls check the route-target.